Transmitting apparatus.



Warm I F. w. MIDGLEY'. TRANSMITTING APPARATUS. APPLICATION FILED FEB. 1,1906.

974,169; fl .Patented Nov. 1, 1910.

WITNESSES:

' UNITED STATES PATENT! onnron.

FREDERICK w. MIDGLEY, or JERSEY cr'rY, EW JERSEY, rissrcnon ro INTERN-A'- rronar. TELEGRAPH cons'nwc'non COMPANY, a CORPORATION on NEW onx.

TRANSMITTING APPARATUS.

Specification of Letters Patent. Patented Nov. 1, 1910.

A lication filed February 1, 1906. Serial No. 298,897

' To all wlzmn "it may concern: I I

Be it known that I, FREDERICK W. Mme- LE1, a citizenof the'United States, residing at J ersey City, in the county of Hudson and State of New Jersey, have invented a new and useful Transmitting Apparatus, of which the following is a specification.-

My invention relates to signaling systems in which the message or signal is represented during t-ransmissionby electro-radiant energy, and resides particularly in the transmitting apparatus for impressing such electro-radiant energy upon the naturalmedia.

It is the" object of my invention to provide transmitting apparatus which with a given input of electrical energy will radiate a maximum amount of electro-radiant enerov. whereby receivers at very distant stations may be affected.

For an illustration of some of the forms my invention may take reference is to be had to the accompanying drawing, in which V Figure 1 is a diagrammatic View of transmitting circuits involvinga looped aerial conductor with a condenser connected at the base of one leg of the loop. Fig. 2 is similar to Fig. 1 cxcept'that an oscillation transformer is employed to impress the high frequency oscillations upon the looped couduc: tor. Fig. 3 is a diagrammatic view illustrating a further modification.

Referring to Fig. 1, A represents a looped.

ductively connected at its top to sand first aerial conductor comprising the legs a, a. Between the leg a and the earth connection 'E is connected the Variable inductance L,

in shunt to a variable portion of which, through the rider r are serially connected the spark gap g and the condenser K. Connected across the spark gap 9 isrthe secondaryS of a step'up transformer whose primary is shown at P and includes a source G of alternating current or other suitable sourceof interrupted current, and the'operators' key is. At' the base of the other leg a" isconnected the condenser C, which is prefcrably variable or adjustable.-

In Fig. 2, the secondary s of an oscillation transformer replaces the inductance L of Fi 1. The primary-of the oscillation trans ormer is shown at p, and difierent amounts of it, adjustable by the riders r,'r' v.

are included in series with the spark gap 9 7' and the condenser-K. As in Fig. l'the secondary'of a step up transformer bridges the spark gap G.

In Fig. 3 the condensers K and K. (or simply one condenser) are connected be: tween the leg at and-the earth E. In shunt to them is connectedthe inductance L, variablev by the rider 1", serially connected with the spark: gap 9. As in Fig. 1 the secondary S of a step up transformer bridges the gap,

In the leg 0, however, are serially connected the adjustable condenser C and the inductance L, the latter variable by the rider 1*.

lhesedispositions of transmitting circuits I end to earth, means for impressing electrical energy upon said conductor, and a conductor connecting the top of said. aerial conductor non-inductively to earth, and acondenser connected in said last named conductor ap-' proximate its earth end.

2. In a wireless signaling system, trans i mitting apparatns comprising the combrna-' tion of a looped aerial conductor, means associated with one leg of said loop for impressing high frequency electrical energy thereon, a second leg of said loop non-m-.

leg and non-inductively connected to earth, and a condenser connected in the second leg approximate its earth connection.

3. In a"wireless signaling system, transmitting apparatus comprising the combination of a looped aerial conductor, a condenser connected in one leg of the vloopapproximate the lower end thereof, the loop legs non-inductively connected at their tops, and the'l'eg containing said condenser noninductively connected to earth,.and means for impressing oscillations upon the loop associated with another leg of the loop.

4:. In a wireless signaling system, transmitting apparatus comprising the combina tion of an aerial conductor, means for. im-

pressing oscillations upon said conductor, a condenser. a non-induct ve connectlon at the a rendering the transmitting ap-' roe top of said aerial conductor, said connection being non-inductive and extending to earth through said condenser.

5. In a wireless signaling system, apparatus for transmitting electrical waves of long period comprising the combination of a looped aerial conductor having its legs connected to. earth, the legs beingnon-in ductively connected together at their tops, a condenser connected in one leg of said loop approximate its earth connection, said leg including said condenser being non-inductive, and an oscillator independent of said loop impressing electrical energy upon a second leg of said loop.

6. In a wireless signaling system, transmittin apparatus comprising the combination 0 a looped aerial conductor, a leg; of

said loop being substantially non-inductlve from its top to earth, a condenser connected in said loop approximate the earth connection, an oscillating circuit independent of said loop, and a fre uency determining ele' ment of said oscillatingiclrcuit connected in a second leg of said loop.

7. In a wireless signaling-system, transmitting a paratus comprising a looped outside of said loop, and an operative connectlon between said means and a secondleg' only of said loop. I

In testimony whereof I have hereunto affixed my signature in the presence of the two subscribing witnesses.

FREDK W. MIDGLEY.

.Vitnesses:

KATHRYN OBRIEN, ALICE S. 'MARSH. 

